Start by creating a shortcut in a new folder somewhere out of the way.
When prompted to enter the address of the application type the following: %windir%\system32\shutdown.exe
This links to the shutdown application. There are, of course, many suffixes which be added to generate the desired result. -f -s -t 10 -c "bye" causes the shortcut to force shutdown the system after 10 seconds with the message 'bye'.
by replacing the -s with a -r this restarts your system. Replacing it with -l logoff the user instantly.
To open the network shutdown gui the suffix -i can be used on its own.